Syngnathiformes (pipefishes and seahorses)

Wikipedia Abstract

The Syngnathiformes are an order of ray-finned fishes that includes the pipefishes and seahorses.These fishes have elongated, narrow, bodies surrounded by a series of bony rings, and small, tubular mouths. Several groups live among seaweed and swim with their bodies aligned vertically, to blend in with the stems.The name Syngnathiformes means "conjoined-jaws". It is derived from Ancient Greek syn (συν, "together") + gnathos (γνάθος, "jaw").